Pressure-regulating valve.



No. 745,402. v PATENTED DEC. l, 1903. H. STRATEPL PRESSURE REGULATING VALVE.

l APPLIGAETION FILED SEPT. 25, 1801.

EO MODEL.

u S 'vili j' i. ME:

'f i l l lili atented December 1, 1903.

UNITED STATESl PATENT Felon.

HERMAN ASTRATER, OF BOSTON, MASSACHUSETTS.

PRESSU'RE-REGU'LATING VALVE.

SPECIFICATION forming part of Letters Patent No. 745,402, dated. December l, 1903.

Original application filed July 20, 1901, Serial No. 69.049. Divided and this application Bled September 25, 1901. Serial No. 76,527. (No model .T0 (1J/Z when?, t may concern:

Be it known that I, HERMAN STRATER, a citizen of the United States,`residing at Boston, in the county of Suolk and State of Massachusetts, have invented an ImprovementinPressnre-Regulating Valves,cf which the following description, in connection with the accom panying drawings,is aspecitication, like characters on the drawings representing like parts.

This invention has for its object the pro-` duction of a novel and efficient pressure-regulating valve; and the present application is a division of an application, Serial No. 69,049, iiled by me the 20th day of July, 1901, and now United States Patent No. 68l,955,wherein the valve forming the subject-matter of this present application is shown in connection with an air-compressing apparatus.

By the valve to be hereinafter described I am enabled to distribute duid from a common source of supply by a plurality of outlets into adilerent channels, the pressure in one of such channels being at substantially the pressure of the source of supply and in the other channel at a lower and adjustable pressure. The regulation of the pressure in the one channel does not alter or vary thepressnre in the other, and while the valve is particularly adapted for use in connection with aircompressing apparatus of the type shown in my said patent it is not restricted to such use or employment.

Figure 1 is an end elevation of a pressureregulating valve embodying my invention viewing the outletend of the case or shell. Fig. 2 is a vertical longitudinal section thereof on the line 2 2, Fig. l; and Fig. 3 is a transverse sectional view on the line r3 033, Fig. 2, looking toward the left.

The valve herein illustrated comprises a hollow shell or case D, having a tubular through-passage d extended therethrough, communicating at its inlet end with an externally-threaded nipple d, adapted to be connected in suitable manner with the fluid-supply, the opposite outlet end communicating by a duct d2 (see dotted lines, Fig. 2) with an annular recess 20, Fig. l, in the end of a head d3, shown as externally screw-threaded. Asecond duct, d4, odset from the center of the case or shell, (see'Fig. 3,) leads directly from the interior of the latter to a second recess,

30, in the head, the recesses being adapt-ed tol under side, as herein shown, the throughpassage d is shown as provided with a port dx, Figs. 2 and 3, opening into the case D and controlled by a puppet-valve d5, its depending stem being guided in a recessed screw-cap di, which closes the lower opening in the case, so that the valve d5 can move toward and from the port dx. The open top of the case, which herein is shown as substantially cylindrical, is provided with an interiorly-threaded hub d8, having an annular inturned flange dg, on the upper face of which is seated a flexible diaphragm E, of stout rubber, thin metal, or other suitablematerial.

A C-shaped yoke e loosely embraces the through-passage d, (see Figs. 2 and 3,) and vthe puppet-valve d5 is screwed into the lower end eX of the yoke, the upper end of the latter bearing against the lower face of the diaphragm and having an upturned threaded spindle e' extended therethrough. A nut c2, having a largeA flat base, is screwed upon the shank and tightly upon the outer face of the diaphragm, securely connecting it with the yoke and preventing leakage around the spindle, the nut being movable up and down in the recessed or cup-like lower end l2 of an upright nipple d10, which is screwed into the hub dsand bears upon the diaphragm E near its periphery, maintaining it fluid-tight upon the seatdi. The nippleisinternally threaded,as at d1, to receive the tubular exteriorly-threaded shank dlg, depending fromV an annular head 114, provided for convenience with a thumb- ICO passes along the through-passage cl and duct d2 to the connected channel or conduit at the pressure of the entering fluid.. At the same time some of the fluid tends to pass from the through-passage into the case D through the port CZX, provided the puppet-valve is open, the spring S acting upon the upper side of the diaphragm,tending to open said valve, While the pressure of the fluid admitted into the case acts upon the under side of the diaphragm, tending to seat the valve and close the port dx. Now by regulating the pressure of the spring in accordance with the full pressure of the iiuid from the source of supply and according to the working pressure desired in the branch or conduit communieating with the outlet d4 it will be manifest that the fluid which passes into the case D and out through said outlet will be at any desired pressure below the full or initial pressure of the fluid as itis received from the source of supply. Should the diaphragm be ruptured, leakage through the nipple d10 can be prevented by screwing down the shank d until the head C214 is seated on the annular upper end ofthe nipple, and, if desired, a A

washer w, of suitable material, may be placed upon the shank immediately below the head.

The openings in the top and bottom of the valve-case D permit the ready assembling of the internal parts of the apparatus, and the variable pressure is controllable at all times from the exterior of the case by or through the governing means for the spring S.

Various changes or modifications may be made in the construction and arrangement herein shown and described without departing from the spirit and scope of my invention.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is

l. A pressure-regulating Valve comprising a case having a tubular through-passage exf tended through it and provided with a port on one side opening into the case and adapted to be connected at one end With the iinidsupply, an outlet at the other end of said into the case, and adjustable means acting upon the opposite side of the diaphragm to open the port, whereby the pressure of the fluid passing through the case to its outlet can be reduced at will below the pressure of the duid-supply and independently of the traverse of fluid through the through-passage.

2. In a pressure-regulating valve, a case having a tubular through-passage therein extended from one to the other side of the case and provided with a port opening into the case, a separate outlet-port for and in continuous communication with the case, a fleXible diaphragm within the case and adapted to be moved in one direction by fluid-pressure in said case, a spring to act upon the diaphragm in opposition to such pressure, means to vary the pressure of the spring, avalve for the port in the through-passage, and a yoke connecting said valve and diaphragm, and loosely embracing the through-passage, the valve being closed by fluid pressure and opened by the spring, withoutv varying the pressure or the iiow of fluid traversing the through-passage.

3. In a pressure-regulating valve, a case having an integral tubular through-passage therein extended from one to the other side and provided with a port opening into the case, a separate 'outlet-port for and in continuous communication with the case, a iieXible diaphragm within the case and adapted to be moved in one direction by iiuid-pressure in said case, a spring to act upon the diaphragm in opposition to such pressure, means to varythe pressure of the spring, said means including a screw-threaded member having an annular head, said head when seated upon the portion of the case supporting the said HERMAN STRATER.

vWitnesses:

GEO. W. GREGORY, AUGUSTA E. DEAN.

IOC 

